Business Segments - Revenues generated following geographic regions (Details ) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Revenue	$ 5,899	$ 4,041	$ 17,637	$ 12,674
Operating Segments | United States
Segment Reporting Information [Line Items]
Revenue	4,929	2,579	14,849	7,594
Operating Segments | Brazil
Segment Reporting Information [Line Items]
Revenue	441	157	1,042	1,810
Operating Segments | Rest of World
Segment Reporting Information [Line Items]
Revenue	$ 529	$ 1,305	$ 1,746	$ 3,270